I've hunted around, but I can't find any reference to my problem with setting the grid spacing for LiveCode using its preferences pain.

I'm running LiveCode 9 on an iMac with OSX 10.11 (El Capitan).

I found an option, in the Appearance tab of the Preferences dialogue, called "Grid spacing (pixels):"

When I try to alter the grid spacing by clicking on the up/down arrows, the number disappears entirely.

If I select the editable field and type to replace the number, again the number disappears entirely.

In both cases, if I use MSG to "put the gridSize", it becomes clear that nothing has been altered.

Is this a known bug with El Capitan? If so, it ought to be a small matter to correct it.

Grateful for all your thoughts.

Ideally, I would like to go into the Preferences stack and see if I can edit the script of the gridSpacing field to solve this issue - and also to add a "Grid" button so I could turn the grid on or off as required.

Especially, thanks to Panos - who has offered a patch (which I intend to install).

Can anyone tell me how temporarily to open this "revpreferencesgui" stack for editing?
I want to add a "Grid" checkbox button to enable/disable the global grid property (whilst also activating/deactivating the GridSize control).
I tried to topLevel it - but it is still treated as a dialogue palette and not editable with the pointer tool, etc.